Alexandrium tamarense (Lebour) Balech

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Alexandrium tamarense

A = Cell with nucleus; B =1'-plate with ventral pore (=arrow); C = Sulcus and part of cingulum; D=Sulcus with fins; E =1' with pore and apical pore complex with pore (comma) and connecting pore (=arrowhead); F=A living cyst (BF) (courtesy of Anna Godhe). A-D = Living cells.(DIC)

Photographer/artist Mats Kuylenstierna

Additional image information

Title
Alexandrium tamarense
Photographer/artist
Mats Kuylenstierna
Copyright holder
Maria Kuylenstierna
Institute
University of Gothenburg, Marine botany
Contributor
Bengt Karlson
Caption
A = Cell with nucleus; B =1'-plate with ventral pore (=arrow); C = Sulcus and part of cingulum; D=Sulcus with fins; E =1' with pore and apical pore complex with pore (comma) and connecting pore (=arrowhead); F=A living cyst (BF) (courtesy of Anna Godhe). A-D = Living cells.(DIC)
Image galleries
Kuylenstierna, Skagerrak-Kattegat

Description

IDs in other systems
Tropic type
A
Morphology
1'-plate with small ventral pore, apical pore complex
Other remarks
Can be confused with other Alexandrium spp. and Fragilidium spp. Toxic and non toxic strains
Distribution: Widely
Harmfulness, IOC
This species is included in the IOC-UNESCO Taxonomic Reference List of Harmful Micro Algae.
Life form
Solitary or in pairs
Size
Length 25-46 µm
Resting spore
+
Culture collections
SCCAP
The Scandinavian Culture Collection of Algae and Protozoa at the University of Copenhagen
More info at http://www.sccap.dk.
Strains: K-1471
Literature
Balech, E. & Tangen, K. 1985. Morphology and taxonomy of toxic species in the Tamarensis group (Dinophyceae): Alexandrium excavatum (Braarud) comb. nov. and Alexandrium ostenfeldii (Paulsen) comb. nov. Sarsia. 70: 333-343.
Dale, B.1977b. Cysts of the toxic red-tide dinoflagellate Gonyaulax excavata (Braarud) Balech from Oslofjorden, Norway. Sarsia. 63: 29-34.
Steidinger, K. A. & Tangen, K. 1996. Dinoflagellates. In: Tomas, C. R. (ed.) Identifying marine diatoms and dinoflagellates. Academic Press, Inc., San Diego, p. 387-584.

Biovolumes

Species Alexandrium tamarense
Author (Lebour) Balech 1995
Division DINOPHYTA (PYRROPHYTA)
Class Dinophyceae
Order GONYAULACALES
Trophy AU
Geometric shape rotational ellipsoid
Formula p/6*d^2*l
Size class 1 2 3
Unit cell cell cell
Size range 25-27 28-30 31-32
Length(l1), µm 25.0 35.0 33.0
Diameter(d1), µm 26.0 30.0 32.0
No. of cells/counting unit 1 1 1
Calculated volume, µm3 8 844 16 485 17 684
Comment 6 6 6
Calculated Carbon pg/counting unit 1 097 1 969 2 104

Source

Olenina, I., Hajdu, S., Edler, L., Andersson, A., Wasmund, N., Busch, S., Göbel, J., Gromisz, S., Huseby, S., Huttunen, M., Jaanus, A., Kokkonen, P., Ledaine, I. and Niemkiewicz, E. 2006 Biovolumes and size-classes of phytoplankton in the Baltic Sea HELCOM Balt.Sea Environ. Proc. No. 106, 144pp. (PDF),
PEG_BVOL.zip